java - TabLayout 上的 setupWithViewPager(android.support.v4.view.ViewPager) 无法应用于 (androidx.viewpager..widget.ViewPager)

Question

如何修复这个错误

setupWithViewPager(android.support.v4.view.ViewPager) in TabLayout cannot br applied to (androidx.viewpager..widget.ViewPager)

这是我的类(class)

package org.apoce.app;
import android.content.Intent;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentPagerAdapter;
import androidx.viewpager.widget.ViewPager;
import android.support.design.widget.TabLayout;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import org.apoce.app.fragment.RecentPostsFragment;
import com.google.firebase.auth.FirebaseAuth;
public class PostActivity extends AppCompatActivity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView( R.layout.activity_post);
		FragmentPagerAdapter mPagerAdapter = new FragmentPagerAdapter(getSupportFragmentManager()) {
			private final Fragment[] mFragments = new Fragment[] {
					new RecentPostsFragment(),
			};
			@Override
			public Fragment getItem(int position) {
			return mFragments[position];
			}
			@Override
			public int getCount() {
				return mFragments.length;
			}
			@Override
			public CharSequence getPageTitle(int position) {
				return getResources().getStringArray(R.array.headings)[position];
			}
		};
		ViewPager mViewPager = findViewById(R.id.container);
		mViewPager.setAdapter(mPagerAdapter);
		TabLayout tabLayout = findViewById(R.id.tabs);
		tabLayout.setupWithViewPager(mViewPager);
	}
}

Answer 1

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentPagerAdapter;
import androidx.viewpager.widget.ViewPager;
import android.support.design.widget.TabLayout;
import android.support.v7.app.AppCompatActivity;

您正在使用 androidx 库和支持库一起。
你不能这样做。

使用androidx库:

• 使用 import com.google.android.material.tabs.TabLayout; 而不是 android.support.design.widget.TabLayout;
  The component包含在 Material 组件库中。

• 更改 android.support.v7.app.AppCompatActivity至 androidx.appcompat.app.AppCompatActivity ;

使用支持库:

• 更改 androidx.viewpager.widget.ViewPager至 android.support.v4.view.ViewPager

• 更改 androidx.fragment.app.Fragment至 android.support.v4.app.Fragment

• 更改 androidx.fragment.app.FragmentPagerAdapter至 android.support.v4.app.FragmentPagerAdapter